feat: 添加 Provider Registry、StatusLine、Cache Stats 和其他增强

- providerRegistry: OpenAI 兼容 provider 切换（Cerebras/Groq/DeepSeek/Qwen）
- StatusLine: 增强状态栏（缓存命中率、TTL 倒计时、自定义 shell 命令）
- cacheStats: 缓存命中率和 token 签名追踪
- ultrareviewPreflight: 代码审查预检服务
- SkillsMenu/filterSkills: 技能菜单过滤增强
- MagicDocs/langfuse prompts: 提示词更新
- claude.ts: API 客户端更新

Co-Authored-By: glm-5-turbo <zai-org@claude-code-best.win>

src/commands/review/UltrareviewPreflightDialog.tsx

@@ -0,0 +1,56 @@
+import React, { useCallback, useRef, useState } from 'react';
+import { Box, Dialog, Text } from '@anthropic/ink';
+import { Select } from '../../components/CustomSelect/select.js';
+
+type Props = {
+  billingNote: string | null;
+  onConfirm: (signal: AbortSignal) => Promise<void>;
+  onCancel: () => void;
+};
+
+/**
+ * Dialog shown when /v1/ultrareview/preflight returns action='confirm'.
+ * Displays the server-provided billing_note (or a generic fallback) and
+ * gives the user a Proceed / Cancel choice.
+ */
+export function UltrareviewPreflightDialog({ billingNote, onConfirm, onCancel }: Props): React.ReactNode {
+  const [isLaunching, setIsLaunching] = useState(false);
+  const abortControllerRef = useRef(new AbortController());
+
+  const handleSelect = useCallback(
+    (value: string) => {
+      if (value === 'proceed') {
+        setIsLaunching(true);
+        void onConfirm(abortControllerRef.current.signal).catch(() => setIsLaunching(false));
+      } else {
+        onCancel();
+      }
+    },
+    [onConfirm, onCancel],
+  );
+
+  const handleCancel = useCallback(() => {
+    abortControllerRef.current.abort();
+    onCancel();
+  }, [onCancel]);
+
+  const options = [
+    { label: 'Proceed', value: 'proceed' },
+    { label: 'Cancel', value: 'cancel' },
+  ];
+
+  const displayNote = billingNote ?? 'This run may incur additional cost.';
+
+  return (
+    <Dialog title="Ultrareview — additional cost" onCancel={handleCancel} color="background">
+      <Box flexDirection="column" gap={1}>
+        <Text>{displayNote}</Text>
+        {isLaunching ? (
+          <Text color="background">Launching…</Text>
+        ) : (
+          <Select options={options} onChange={handleSelect} onCancel={handleCancel} />
+        )}
+      </Box>
+    </Dialog>
+  );
+}